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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 45, Iss. 36 — Dec. 20, 2006
  • pp: 9176–9181

Spectral characterization of integrated acousto-optic tunable filters by means of laser frequency modulation spectroscopy

Antonio Di Maio, Mario Salza, Gianluca Gagliardi, Pietro Ferraro, and Paolo De Natale  »View Author Affiliations

Applied Optics, Vol. 45, Issue 36, pp. 9176-9181 (2006)

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The spectral characteristics of an integrated acousto-optic tunable filter (AOTF) as well as its responsivity to the rf driving signal and sensitivity to temperature changes are experimentally investigated and quantified using a diode-laser-based interrogation system. A spectroscopic technique, exploiting the rf frequency modulation of the laser beam and the phase-sensitive detection of the AOTF transmission, has been used for this purpose. That allows for the generation of a dispersivelike signal, which serves as a reference for tracking any wavelength change of the filter's peak with high resolution. The possibility of using the integrated AOTF as a spectrum analyzer with this interrogation scheme for fiber Bragg grating (FBG) strain sensing is also discussed.

© 2006 Optical Society of America

OCIS Codes
(060.2630) Fiber optics and optical communications : Frequency modulation
(140.2020) Lasers and laser optics : Diode lasers
(230.1040) Optical devices : Acousto-optical devices

Original Manuscript: February 21, 2006
Revised Manuscript: July 24, 2006
Manuscript Accepted: August 23, 2006

Antonio Di Maio, Mario Salza, Gianluca Gagliardi, Pietro Ferraro, and Paolo De Natale, "Spectral characterization of integrated acousto-optic tunable filters by means of laser frequency modulation spectroscopy," Appl. Opt. 45, 9176-9181 (2006)

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